/Engine/Plugins/Enterprise/DataprepEditor/Source/DataprepCore/Public/SelectionSystem/DataprepSelectionTransform.h
This function is the same has OnExcution, but it's the extension point for an transform defined in c++. It will be called on the transform execution.
virtual void OnExecution_Implementation ( const [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & InObjects, [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & OutObjects )